Section 81. Sections seventy-three to seventy-nine, inclusive, shall not authorize the taking of land nor authorize a town to lay out or construct any way which may be indicated on any plan until such way has been laid out as a highway; nor shall said sections render a town liable for damages except such as may be sustained under section seventy-six by reason of the making and filing of any new plan or by reason of changes made in any plan already duly attested and filed, and for such damages as may be sustained by reason of the acts of the board of survey, its officers and agents under section seventy-nine. Any person injured in his property as aforesaid or by the establishment or discontinuance of exterior lines under section eighty may recover the damages so caused under chapter seventy-nine.